362 48. POLYPODIUM, PHYMATODES. 



but smaller ; texture coriaceous ; both sides naked ; main veins distinct to the 

 edge, parallel, with copious fine areolse between them, with free included vein- 

 lets ; sori in a single row, nearer the midrib than the edge. HTc. Sp. 5. p. 74. 



Hab. Japan to Formosa. 



350. P. (Phym.) pteropus, Blume ; rhizome wide-creeping, hypogseous, the 

 emergent portions clothed with blackish lanceolate-subulate scales"; st. 4-6 in. 1., 

 sometimes scaly ; fr. varying from oblong-lanceolate entire to ternate or pin- 

 natifid, with a large terminal lobe 4-9 in. 1., 1-2 in. br., and 2 smaller ones on 

 each side ; texture thin but firm ; colour dark-green ; both sides naked ; areolce 

 fine, copious, the main veins not distinct to the edge ; sori small, scattered. 

 P. tridactylon, Wall. Hk. Sp. 5. p. 75. 



Hab. N. India to Ceylon, Malaccas, Philippines, Hong-Kong, Formosa. Often grows 

 under water. 



ft Dipteris, Reinw. Fronds flabellate, in two halves, which are deeply lobed 

 from the circumference in the direction of the base* Sp. 351-353. 



351. P. (Dipt.) Dipteris, Blume; st. strong, 3-5 ft. ].; fr. 1-3 ft. 1., and 

 much broader, the main lobes reaching three-quarters of the way down, the 

 edges sharply toothed ; texture subcoriaceous ; upper surface dark-green, lower 

 very glaucous ; main veins very prominent, dichotomously forked ; areolce 

 copious ; sori very minute, scattered irregularly, especially plentiful near the 

 main veins, confluent, not gummy. P. Horsfieldii, R. Br. Hk. Sp. 5. p. 99. 

 P.* conjugatum, Kaulf. (not Lam.}. 



Hab. Malaccas and Polynesian Islands, as far east as Fiji. This and the next are very 

 distinct in habit from the rest of the genus. 



352. P. (Dipt.) Wallichii, R. Br. ; st. strong, 2-3 ft. 1. ; fr. 1-3 ft. 1. and 

 much broader, the main lobes reaching three-quarters of the way down, the 

 edges not toothed, the ultimate lobes acuminate ; texture coriaceous ; upper 

 surface dark-green, lower dirty-white or subferruginous ; main veins very 

 prominent, dichotomously forked ; areolce copious; sori small, generally in distinct 

 rows, not confluent but distributed equally over the surface, often gummy. 

 Hk. Sp. 5. p. 99. 



Hab. N. India, subtropical region. 



353. P. (Dipt.) Lobbianum, Hk. ; st. 1 ft. or more 1. ; fr. 1 ft. 1. and as broad, 

 the main lobes reaching down to the base, 3 or 4 times dichotomously forked, 

 the ultimate ones linear acuminate, entire ; texture coriaceous ; midrib only 

 prominent ; areolce principally in one large costal series with 1 sorus in each. 

 Hk. Sp. 5. p. 100. 



Hab. Mount Ophir, Malayan Peninsula and Sarawak, Borneo, T. Lobb. A very dis- 

 tinct plant, differing from the preceding by its very deep narrow lobes and few solitary 

 sori. 



**# Fronds deeply pinnatifid. Sp. 354-383. 



f Fronds uniform, or the barren ones not drynarioid. Sp. 354-372. 



354. P. (Phym.) leucosporum, Klotzsch ; rhizome woody, wide-creeping, the 

 scales lanceolate, black in the centre, with a scariose border ; st. 2-8 in. 1., firm, 

 erect, furfuraceous ; fr. 4-8 in. 1., 2-3 in. br., the upper part bluntly sinuated, 

 the lower cut more than halfway down into blunt lobes - in. br. ; texture 

 coriaceous ; upper surface slightly, lower densely coated with minute fuifu- 

 raceous scales ; veins hidden ; sori large, prominent, uniserial. Hk. Sp. 5. p. 76. 



Hab. Columbia. Habit and scales of Lepicystis and P. lanceolatum. 



